[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduced a national invention-granting patent - a single-photosensitive water meter sensor. The patent was filed by Jinan Information Technology Co., Ltd. and it was authorized on December 29, 2017.
The invention relates to a water meter sensor, in particular to a water meter sensor in which the sensor mainly uses a photosensitive electronic component to operate to collect the total flow, instantaneous flow rate, and positive and negative state of the water meter.
Background of the invention
At present, the known double-photosensitive water meter sensor uses two photosensitive electronic components inside the sensor to collect the operating state of the mechanical water meter. Because the sensing regions of the two photosensitive electronic components are different, and the two photosensitive electronic components will exist between the two. The sensing error may cause the optical information sensed by the two photosensitive electronic components to be greatly different, and when severe, it can affect the accuracy and stability of the water meter sensor. Due to the need to use two photosensitive electronic components to operate, resulting in a double-sensitive water meter sensor has a problem of greater power consumption, higher cost, and a more complex structure.
Summary of the Invention
In order to solve the problems caused by the operation of the two-photosensitive water meter sensor using two photosensitive electronic components, the present invention provides a single photosensitive sensor that uses a photosensitive electronic component to operate to achieve the full function of the double-sensitivity water meter sensor. Water meter sensor, and the water meter sensor has higher collection accuracy, better stability, lower power consumption and lower cost than the double-sensitive water meter sensor.
The drawing is a schematic structural view of the present invention.
The technical solution adopted by the present invention to solve its technical problems is to align the photosensitive part of the single-photosensitive water meter sensor with a point in the rotation track of the middle part of the water meter pointer, and then fix the sensor on the dial glass of the water meter. The water meter sensor has a photosensitive electronic component and two light emitting diodes. The two light emitting diodes alternately emit flashes under the unified modulation of the control circuit in the water meter sensor, and the emitted light is dimmed by the lens and illuminates two water meter pointers along the rotation track of the water meter pointer and arranged in parallel. The light spot that overlaps most of the sensing area of â€‹â€‹the photosensitive electronic component. The rotating water meter pointer passes through the overlapping area of â€‹â€‹the spot and the sensing area. Due to the large difference between the water meter pointer and the scale of the water meter, according to the absorption and diffuse reflection theory of the object's color, the colored pointer absorbs light of other colors than its own, and the light intensity of the diffused light of the pointer Decreasing, so the diffuse reflection of water meter pointer under the same incident light and the diffuse reflection of the water meter dial discrepancies.
The control circuit of the single-photosensitive water meter sensor controls the light emission of a certain light emitting diode, and the photosensitive electronic component senses diffuse reflection light. The signal processing unit analyzes the diffuse reflection light, removes the stray light interference and obtains the change of the diffuse reflection light, when sensing When the diffuse reflection light changes, the distinctive feature of diffuse reflection light of the water meter pointer indicates that the water meter pointer is within the illumination spot of the light emitting diode within the photosensitive electronic component sensing area. Since the two light emitting diodes alternately emit light, and the spot irradiated on the dial is arranged along the rotation trace of the water meter pointer and arranged in parallel, the positive and negative reversal of the water meter pointer is recognized according to the difference in the illumination spot of the light emitting diode first entered by the monitored water meter pointer. status. According to the time for two consecutive monitoring of the forward rotation of the pointer, the cycle of the pointer rotation is known. According to the monitored water meter pointer positive and negative state, rotation period and cumulative number of cycles, the instantaneous flow and total flow of the water meter can be calculated.
The beneficial effects of the present invention are: a single photosensitive water meter sensor mainly uses a photosensitive electronic component to operate to achieve all the functions of the double-photosensitive water meter sensor, and the water meter sensor has higher collection accuracy than the double-sensitive water meter sensor. Better stability, lower power consumption, and lower cost.
For more information, please download the full specification of the patent.
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